>> I'm a software engineer with a full-time job, but I have lots of spare time in my off hours I have a contract in my current workplace which lets me bill off

>> I'm a software engineer with a full-time job, but I have lots of spare time in my off hours I have a contract in my current workplace which lets me bill off-hours (they also pay for my taxi costs when I work late, they also pay double during holidays) so I am happily not taking any side jobs. Your day job can become your night job if you can produce more work off-hours for them.